FORTUNE — No 16 GB smartphone on the market actually delivers 16 GB of usable storage, but some come closer than others.
The worst: Samsung’s Galaxy S4, with only 8.56 GB (53.5%).
Where did the other 46.5% go? Which?’s John Barrow thinks he knows:
On the plus side for Samsung, the Galaxy comes with a Micro SD slot for adding more memory as needed. The iPhone does not; with Apple, what you buy is what you get.